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    <title>菜鸟教程(runoob.com)</title>
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        p {border:1px solid red;}
        p.dotted {outline-style:dotted;}
        p.dashed {outline-style:dashed;}
        p.solid {outline-style:solid;}
        p.double {outline-style:double;}
        p.groove {outline-style:groove;}
        p.ridge {outline-style:ridge;}
        p.inset {outline-style:inset;}
        p.outset {outline-style:outset;}
        p.green {outline:green dotted thick;}
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<p class="dotted">点线轮廓</p>
<p class="dashed">虚线轮廓</p>
<p class="solid">实线轮廓</p>
<p class="double">双线轮廓</p>
<p class="groove">凹槽轮廓</p>
<p class="ridge">垄状轮廓</p>
<p class="inset">嵌入轮廓</p>
<p class="outset">外凸轮廓</p>
<p class="green">简写，green dotted thick</p>
<p><b>注意:</b> 如果只有一个 !DOCTYPE 指定 IE 8 支持 outline 属性。</p>
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